tce-load -i compiletc python3.8-meson 

wget https://github.com/videolan/dav1d/archive/refs/tags/0.9.1.tar.gz

cd dav1d-0.9.1

mkdir build
cd build

CC="gcc -flto -march=armv8-a+crc -mtune=cortex-a72 -Os -pipe" CXX="g++ -flto -march=armv8-a+crc -mtune=cortex-a72 -Os -pipe  -fno-exceptions -fno-rtti -DNDEBUG" meson --prefix=/usr/local --buildtype=plain ../

ninja [1m 45.94s]
sudo ninja install